FIELD: mining.
SUBSTANCE: invention relates to mining operations and can be used in development of placer deposits by dredges. Method includes opening and flooding of landfill, dredging of sands by their power with adjacent cuts within boundaries of dredging stroke, dumping of dumps into mined space, change of sands capacity in cuts by means of open mine working, arrangement of sands on the surface of opposite cut. Between opposite cuts on placer rock bed there is an open mine working, at that, lower slope of the working opening coincides with lower edge of longitudinal slope of ledge of previous dredge cut, and rocks from working are arranged on surface of both slopes, observing condition of maintaining their previous section, which was before performance of working.
EFFECT: creation of additional worked-out space between opposite dredging passages and arrangement of excessive volume of gale-lixiviation part of dredge dump.
1 cl, 3 dwg
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